PHP addslashes () and Stripslashes () implement string escape and restore usages, escape character usage _php tutorial

PHP addslashes () and Stripslashes () implement string escape and restore usages, use of escape characters

Examples in this article describe the use of addslashes () and stripslashes () in PHP for string escaping and restoration. Share to everyone for your reference, as follows:

The addslashes () function in PHP returns a string that adds a backslash before a predefined character.

The predefined characters are:

Single quotation mark (')
Double quotation marks (")
Back slash (\)
Null

the Stripslashes () function deletes a backslash added by the addslashes () function .

The usage examples are as follows:

<?php $str = "Select * from ' book ' where Bookname= ' house of Help '"; echo $str. "
";//output String $str echo $astr =addslashes ($STR);//string escape and Output echo"
"; echo stripslashes ($ASTR);//Will escape string restore?>

The results of the operation are as follows:

SELECT * from ' book ' Where Bookname= ' home ' select * from ' book ' where bookname=\ ' help home \ ' select * from ' book ' where bookname= ' Home for the guests '

Add:

Addslashes () differs from the Addcslashes () function:

This is two very similar. but using a different function, the addslashes () function returns a string that adds a backslash before the predefined character, and the Addcslashes () function returns a string that adds a backslash before the specified character, so addcslashes () The function needs to add additional parameters that describe the specific characters that need to be added with backslashes.

The two specific differences and usage can refer to the relevant articles of this site "parsing PHP addslashes () and addcslashes () functions of the difference and comparison"

I hope this article is helpful to you in PHP programming.

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